Microstructure and Corrosion Resistance of Fe-Based Coatings Prepared by Twin Wires Arc Spraying Process

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• 作者：Jinran Lin (1)
  Zehua Wang (1)
  Pinghua Lin (2)
  Jiangbo Cheng (1)
  Jingjing Zhang (1)
  Xin Zhang (1)
  
• 关键词：amorphous/nanocrystalline coating ; corrosion resistance ; Fe ; based coating ; twin wires arc spray
• 刊名：Journal of Thermal Spray Technology
• 出版年：2014
• 出版时间：February 2014
• 年：2014
• 卷：23
• 期：3
• 页码：333-339
• 全文大小：562 KB
• 作者单位：Jinran Lin (1)
  Zehua Wang (1)
  Pinghua Lin (2)
  Jiangbo Cheng (1)
  Jingjing Zhang (1)
  Xin Zhang (1)
  
  1. Institute of Metals and Protection, College of Mechanics and Materials, Hohai University, 1 Xikang Road, Nanjing, 210098, People’s Republic of China
  2. Southeast University, Nanjing, 211189, People’s Republic of China
  
• ISSN：1544-1016

文摘

FeB, FeBSi, and FeNiCrBSiNbW coatings were prepared by twin wires arc spraying process on AISI 1045 steel substrate, and the microstructure and phases were characterized by scanning electron microscope, transmission electron microscope, and x-ray diffraction. The corrosion resistance was investigated by means of electrochemical tests. It was found that FeB coating and FeBSi coating were composed of α-Fe, FeO, and Fe2O3 phases. FeNiCrBSiNbW coating consisted of amorphous phase and α-(Fe, Cr) nanocrystalline phase, with porosity of 1.8%, hardness of 807?Hv0.1 and tensile bonding strength of 52.1?MPa. Three kinds of electrochemical tests were employed to identify the corrosion resistance of the coatings. The results indicated that the FeNiCrBSiNbW coating had a superior corrosion resistance, much better than FeB and FeBSi coatings. It was attributed to the amorphous/nanocrystalline structure and the presence of corrosion-resistant element Cr.